CN103651046B - Anti-blocking flow channel pressure compensation watering device - Google Patents

Abstract

The invention belongs to the field of irrigation, and in particular relates to an anti-clogging channel pressure compensation emitter. In order to provide an anti-clogging flow channel pressure compensation emitter that can control the deposition position of impurities entering the flow channel and avoid blockage of the emitter flow channel, the technical solution adopted in the present invention is: by setting a variable curvature anti-clogging flow channel that changes in curvature, And in the variable curvature anti-clogging flow channel, the anti-clogging tooth structure is set to control the position of the impurity deposition in the variable curvature anti-clogging flow channel, preventing impurities from depositing in the narrow part of the flow channel, and achieving the goal of preventing the emitter flow channel The purpose of blocking.

Description

An anti-clogging channel pressure compensation emitter

technical field

The invention belongs to the field of irrigation, and in particular relates to an anti-clogging channel pressure compensation emitter.

Background technique

The blockage of emitters has always been a difficult problem in water-saving irrigation projects, and the blockage of flow channels is the main reason for the blockage of emitters. To prevent the emitter from clogging, in addition to strengthening the filtration, it is also necessary to consider the impurities that have not been filtered out and enter the emitter, so that these impurities can pass through smoothly or be deposited in a position that is not easy to block. The world-famous Dujiangyan Water Conservancy Project has been used until today because of its strong anti-clogging and sediment-discharging capabilities, benefiting the Chengdu Plain for more than two thousand years. Therefore, it is very important to design an emitter with good flow channel anti-blocking performance.

Contents of the invention

The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, and provide an anti-clogging channel pressure compensation emitter that can control the deposition position of impurities entering the channel and avoid blockage of the channel of the emitter.

In order to achieve the above purpose, the technical solution adopted by the present invention is: comprising an emitter housing provided with an emitter inlet, a variable curvature anti-clogging flow channel provided with an emitter outlet that is fastened in the emitter housing, and an emitter housing The water inlet in the body is provided with an elastic diaphragm to adjust the water flow pressure;

The variable curvature anti-clogging flow channel is provided with a water flow inlet and an outlet;

The outer circle of the variable-curvature anti-clogging flow channel is composed of smooth arcs with different curvature radii, and the curvature radius of the outer circle at the proximal end of the water flow inlet is smaller than the curvature radius of the outer circle at the far end of the water flow inlet;

The variable-curvature anti-clogging flow channel is provided with a settling tooth structure.

The radius of the inner circle of the variable-curvature anti-clogging channel is 5.5 mm, the radius of the smooth arc of the outer circle from the water inlet in the counterclockwise direction is 6.5 mm, the radius of the midpoint is 7.58 mm, and the radius of the end point is 6.5 mm.

The paired teeth structures are distributed on a group of mutually perpendicular planes of the variable-curvature anti-clogging flow channel.

Compared with the prior art, the present invention takes into account the three-dimensional accumulation of impurities in the flow channel in actual use, and according to the flow and sediment movement law of the bend used in Dujiangyan, that is, the surface water of the bend flows to the concave bank, and the bottom water flows to the convex bank. The sediment carried by the bottom water accumulates on the convex bank, and the deposition of impurities is well controlled by setting the variable curvature anti-clogging flow channel with changing curvature and setting the anti-clogging tooth structure in the variable curvature anti-clogging flow channel. Position, so as to well control the position of impurity deposition in the variable curvature anti-clogging flow channel, prevent impurities from depositing in the narrow part of the flow channel, and achieve the purpose of preventing the emitter flow channel from clogging.

Description of drawings

Fig. 1 is an exploded view of the overall structure of the present invention;

Fig. 2 is the structural diagram of the variable curvature anti-clogging flow channel of the present invention;

Fig. 3 is the sand particle volume fraction distribution figure of curve numerical simulation of the present invention;

Fig. 4 is a distribution diagram of the volume fraction of sand particles in the anti-clogging channel of the present invention.

Detailed ways

Referring to Fig. 1 and Fig. 2, the present invention includes an emitter housing 5 provided with an emitter inlet 4, and a variable-curvature anti-clogging flow channel 2 provided with an emitter outlet 1 that is fastened in the emitter housing 5, and the variable-curvature The anti-clogging flow channel 2 is provided with a water inlet and an outlet, and an elastic diaphragm 3 for adjusting the water flow pressure is arranged at the water inlet in the emitter housing 5; the radius of the inner circle 6 of the variable curvature anti-clogging flow channel 2 is 5.5mm, and Circle 7 is a smooth circular arc counterclockwise from the water inlet. The radius of the starting point is 6.5mm, the radius of the midpoint is 7.58mm, and the radius of the end point is 6.5mm. superior.

Referring to Fig. 3 and Fig. 4, the present invention is different from the previous situation where the flow channel of the emitter is only designed on a two-dimensional plane. It considers the three-dimensional accumulation of impurities in the flow channel in actual use, and learns from the curved water flow and sediment used in Dujiangyan. The law of movement, that is, the surface water of the bend flows to the concave bank, the bottom water flows to the convex bank, and the sediment carried by the bottom water accumulates on the convex bank. Through the numerical simulation of this physical phenomenon, a reasonable simulation method is determined. By observing Figure 3 shows that the simulated distribution is very close to the actual sediment distribution. By changing the curvature of the flow channel and designing the tooth structure that plays a role in sedimentation, and using the previously verified numerical simulation method, the sand particle volume distribution of the new anti-clogging flow channel is obtained. It can be seen from Figure 4 that the pair with a relatively wide flow channel The sand particle volume fraction is the highest at the tooth structure, which effectively controls the sand deposition position, avoids sand deposition in the narrow position of the flow channel, and achieves the purpose of preventing the emitter flow channel from being blocked.

Claims (3)

1. An anti-clogging flow path pressure compensation emitter, comprising an emitter housing (5) provided with an emitter inlet (4), and a device for adjusting water flow pressure at the water inlet in the emitter housing (5) The elastic diaphragm (3) is characterized in that it also includes a variable curvature anti-clogging flow channel (2) that is fastened in the emitter housing (5) and provided with the emitter outlet (1); The variable curvature anti-clogging flow channel (2) is provided with a water flow inlet and an outlet; The outer circle (7) of the variable curvature anti-clogging flow channel (2) is composed of smooth arcs with different curvature radii, and the curvature radius of the outer circle (7) at the proximal end of the water flow inlet is smaller than the curvature radius of the outer circle at the far end of the water flow inlet; The variable-curvature anti-clogging flow channel (2) is provided with a settling tooth structure. 2. An anti-clogging channel pressure compensation emitter as claimed in claim 1, characterized in that: the inner circle (6) of the variable curvature anti-clogging channel (2) has a radius of 5.5 mm, and the outer circle (7 ) The starting radius of a smooth arc counterclockwise from the water inlet is 6.5mm, the midpoint radius is 7.58mm, and the end radius is 6.5mm. 3. An anti-clogging channel pressure compensation emitter as claimed in claim 1 or 2, characterized in that: said pair of tooth structures are distributed on a group of mutually perpendicular planes of the variable-curvature anti-clogging channel (2) superior.